Demountable wheel rim assembly



March 151932. E. MADER nEuouN'rABLE WHEEL nm ASSEMBLY Filed arch 18, v1951 5 Sheets-Sheet 1 15, l MA'DER l 1,849,464

DEMOUNTABLE WHEEL RIM ASSEMBLY Filed laren 1s, 1951 -v'sboetsnt v2 Mauth 15, 1932. E.' MADER 1,849,464

' DEMOUNTABLE WHEEL RIM AssEMBLf- Filed March 18, 1931 I 5 Sheets-Sheet 3 A DMOUNTABLE WHEEL RIM ASSEIIBLY Filed uarn 1a, 1 951 5 Sheng-Shea' 4' March l5, 19324. E MADER' 1,84%;6

BEMOUNTABLE WHEL am ASSEMBLY Patented Mar. 15, 1932 UNITED STATES PATENT oFFicl?.

EMIL KADER, 'OF PROSEN, NEAR ELSTEBWEBDA, GERMANY'4 I DEMOUNTABLE WHEEL RII .ASSEMBLY Application led Iarch 18, 1931, Serial No. 523,559, and in Germany December 12, 1,929.

In circumferentially subdivided .wheel rims it is known to unite the rim parts by bolts arranged in parallel to the wheel axis and having each a pair of enlargements. .The

5 same olts serve also for fastening the rim parts to the wheel body.

This construction has the disadvantage that special clamping devices are necessary, if the rim with a mounted andblown up l tire shall be fastened to the wheel body.

According to the invention, the bolts are in en agement on two grooved portions of the w eel body in such manner that in use one rim part is freed from the bolt and bears l against an abutment of the wheel body.

Thereby it is attained that by rotating the bolt the rim parts joinedto'each other, includin a blown up tire and mounted on the wheel ody in the position of use the air pressure of the tire functions through the bolts and the felly, so as to hold all parts under tension and secured against loosening. .All clamping screws or fastening devices are y thereby entirely avoided.

Somel constructional examples of the invention are illustrated in the drawings, 1n

which Fig. 1 is a section example, l l y Fig. 2 is a partial lateral view thereof,

Fig. 3 is a section taken on line B-C of Fig: 1,

' igs. 4, 4aand 4b are a lateral view and two end views of the bolt having two'en lar ements,

of the rims of a rst 1s a section of another example, Fig. 6 is a partial lateral view thereof, the bolt uniting only the rim halves,

Fig. 7 is a vpartial lateral view thereof, thc 4 bolt Joining the rim parts to the wheel body, Fi 8 and 9 are a lateral and an`end view of asolt of different shape, Y

Fig. 10 is a section of a twin wheel arrangement, f p f Figs. 11 and 12 are a lateral view and a cross section of a yieldin ring,

Figs. 13 and Mare a ateral view, partly in section, and an endgview of a screw wrench serving for handling the bolts.

According to Figs. 1 to 4b, a rim consists of two portions 1, 2 of advantageously equalaxial dimensions, and grooves 3, 4 are worked in said portions r receiving enlargements or shoulders 6, 7 of a bolt 5. One shoulder 'coversabout 220 of the bolt periphery and the other shoulder 7 about 70 (Fig. 4)..

The wheel body 8 and its felly 9 are also provided with grooves 10, 11 in opposition to said grooves 3, 4'. The grooves 4 and 11 correspond to the shape of one shoulder further the groove 10 to the shape of the other shoulder 6, whereas the groove 3 is somewhat larger for certain reasons.

Several abutments 12 are provided on onev side of the wheel 8, 9, and an inwardly bent flange or border 13 on its other side.

The action is as follows:

At first the rim partl is united -with the bolts 5, land thereupon the complete tire is mounted on 'said portion. The second rim part 2 is thereafter placed on the projectii bolts 5, the shoulders 7 of which are all turn against the centreof the The bolts 5` are then turned each by anangle of about 180, so that the shoulders 7 are directed radiall outward and the flattened faces ofthe shoul): ders 6 against the centre. Thereby both rim parts are safely united to eachother, and the.

tyre may be filled with compressed air for being mounted on Athe wheel or for being taken alongas a spare tire in condition ready for use. The shoulders 6 and 7 take up the tire pressure land join the rim halves together.

For mountin the rims and tyre on the wheel of a car e rims are put on the wheel 8, 9 up to the abutment 12, so that an axial displacement to the right side is prevented. A peripheral displacement, tending to arise 4by braking, is prevented by the bolts 5 engaging in the grooves of the wheel body. The

olts and grooves are worked to slidingly fit to each other,lwhereas the other surfaces have sufficient play. The bolt 5 is then turned by 180 by aid of a screw'wrench, and advan` tageously a pressure lever is inserted in the border 13 so as to press on the rimand unload the'bolt, which then can easily be turned by a special square bored .screw wrench.

The action and positions o f the bolt rare therefore as follows. f A

7 and Durin mounting the rimson the wheel at first the s oulders 6, 7 rip only therim halves 1,- 2. In turning the olt, the shoulder 6 engages thle groove 10 of the wheel body 8, 9, andthis "commences already at a rotation by 5.

The shoulder 7 grips still the rim part 2, and commences only on a rotation by 110 to leave the rlm, whereas the shoulder 6 then -already engages the wheel body by about 105.

Therefore, if the bolt after being put on. the wheel is rotated by 180, the shoulder 6 has its flattened face directed outward, so that about 120 of it are enclosed in the wheel body and 120 (60 on each side of the bolt) in the rim.

wheel body by its shoulders 6, 7. The pressure of the tire is transmitted by the 120-portion of the shoulder 6 to the bolt and distributed on both shoulders 6 (110) and 7 (70),

so that the bolt and the shoulders work under extraordinarily favoralle conditions.

According to Figs. 5 o 14, the invention is still furtlierelaborated therein, that the bolts engage in a single grooved portion of the wheel body, and one rim part is in use position freed from the bolt and heldby an abutment of the wheel' body, without the necessity of using special pressing devices. The rim consists again of arts'1a,-2a provided with recesses 14, 15. bolt 16 is provided with shoulders 17, ,18 fitting tosaid recesses 14, 15 respectively. The wheel body 8a is provided with recesses 19 of larger -breadth than the shoulder 18 and than 'the oppositely provided recess 15. The abutments 12a have the saine action as above described in connection with Figs. 1 'to 4.

The shoulders 17, 18 of the-bolt 16 are of equal size, covering about and are angul larly displaced against each other'by any de'- l recesses 195 arefprovided sired angle. The shoulders of the bolts may advantageously have oblique faces 20, 21`

( 8) to better sustainthe tire pressure. e larger size of the excavation 19 with respect to the recess 15 has the elect', that,

when the bolt 16 is iniuse position and disengaged f om the rim 2a,r-the latter applies to the abu ment 12a, whereas the rim 1a draws the bolt in the opposite direction so that its shoulder 18 can no longer enter the recess 15 andithereby, the bolt is secured against any unwanted rotation (Fi 5).

In twin wheels accor in'to Fi ehn' each other,

` for thereby allowing of varying the distances of the tyre middle planes against each other.

Inplace of the abutments 12 or 12a, a yielding ring l groove- 22 of thewheel body.

` The said yielding'ring 23, shown in Figs.

`11 and 12, is slotted and bent off on theends in the shape of; hooks 24, which it onto reagainst radial coming out close the shoulder 17 b or 186.

23 is inserted in a special peripheral'- 'cesses 2b of the rims. Thereby the loose ring 23 is secured against rotary displacement and fromthe annular grooves.

Instead of a ment may be formed of several ring parts v which act in thepsame manner as the yielding ring. 1

A screw wrench 26 (Figs. 13 and 14) serves 'yieldingV ring also an' abut- 7 for-turning the bolt 16?), 17 b, 1.81) (Figures 8 75 and 9). It consists of a member having a bore 27 .ofa somewhat larger diameter than the bolt and a sector shaped recess 28 covery able to e11-- The bolt has several tasks: When dismantled from the wheel bod ,the rim halves or rim parts are held toget er vby said bolt and in theirturn contain the blown up air tire, so that the bolt serves as a device. Further, in connection with the wheel body, the'shoulders in consequence of their special arrangement serve by aid of a rotation of the bolt forsecurin the rims and the blown up tire to the wh'ee body, and at- 90 the same time both rims remain continuously held to each other, so as to be com letely sei cured against any jumping away rom each other.

I claim: p 1. Ademountable wheel rim assembly com pr-ising in lcombination a felly -formin part of a wheel body, a circumferentially dlvided rim havin two removable rim parts adapted to' be axial y juxtaposed on said felly, an axial 100.

abutment on said felly for said'removable rim, a plurality of bearings on the rim part 1 remotefrom said abutment, 'a plurality of fork-shapedprojections on the rim part adprojections, each of said bolts having ar'st shoulder adapted to engage the -res ectivev bearing, and a second shoulder ada te to engage the respective fork arm an to disen- 110 Iclamping l jacent said abutment, axial bolts rotatably held in said bearings and traversing said 3. A demounta le wheel rim assembly as I claimed in claim 1, wherein the shoulders have the shape iof sectorsextending in ditfe'rent radial directions ofthe bolts. l

4. A demountable-wheel rim assembly as claimed in claim 1, wherein one shoulder is inserted with axial play in the respective rim part.

5. A demountable wheel vassembly s 130 claimed in claim 1, wherein the shoulder nea!- est to the abutment is inserted with axial play in the wheel body rim.

6. A demountable wheel rim assembly as claimed in claim 1, wherein the shoulders on their sides directed against each other have conical surfaces, and the rim parts have excavations fitting thereto.

7. A demountable wheel rim assembly comprising in combination a fell forming part of a wheel body and provi ed with a circumferential groove, an annular member adapted to be inserted in said groove and projecting outwardly for serving as an axial abutment, a circumferentially divided rim having two removable rim dparts adapted to be axially juxtaposed on sai felly, axial bolts enclosed between said fell and rim, and two shoulders on each of 'sai bolts for uniting said removable rim parts in one rotative position of said bolts, and for engagin said felly and loosening the rim part neigh red to said abutment in another position.

8. A demountable wheel yrim assembly as claimed in claim 7 wherein the abutment has a radial slot and axially projecting hooks on its ends near said alot, and the adjoining rim part has axial for receiving Sai hooks.

In witness' whereof I aix m J; ature. 

